Milking-machine.



H. DROUTLEGE. MILKING MACHINE.

APPLICATION FILED APR. 6, 1911.

Patented May 6, 1913.

' TE TATES FTFNT HENRY DROUTLEGE, 0F PONSONBY, AUCKLAND, NEW ZEALAND.

MILKING-MACHINE.

inattesa,

Speciication of Letters Patent.

Patented May `6, 1913.

Application ei .april 6, 1911. Serial No. 619,371.

To all whom t may concern Be it known that l, HENRY DROUTLEGE, `a citizen of the Dominion of New Zealand, and residing at 47 Vermont street, Ponsonby,

Auckland, in the Provincial District of' Auckland, in the Dominion of New Zealand, have invented certain new and useful Improvements in lvilking-Machines, of which the following is a specification.

The invention relates to the class of milking machines in which the milking is effected by vacuum, and in which pulsation is produced in the ieX-ible linings of the teat cups bythe alternate withdrawal and admittance of air.

Theinvention provides improvements in the construction of the teat cups and in the pulsator whereby pulsation is effected in a series of said cups; improvements are also provided 'in the pail head vthrough which the milk passes to the vacuum pail.

I-will describe my improvements in detail by thcaid of the -accompanying drawings, wherein 'Figure l, is a sectional elevation of the parts referred to assembled. Fig. 2, a sectional planof the teat cup on A-A Fig. 1. Fig. 3, a central section, and Fig. 4, an inverted plan of a clamping disk of the teat cup. Fig. 5, is a front elevation of the pail head. Fig. 6, is an end elevation of the branch pipes shown in Fig. 1, and .Fig.7, an end sectional elevation of the on B-B, Fig. 1. Fig. 8, is a vertical central section, and Fig. 9, a sectional -planon l) D, Fig. 8, showing a modification in the teat cup. l

I will irst describe the teat cup by reference to Figs. 1 to 4 inclusive. The rigid metallic cylindrical casing 1 receives the iiexible rubber pulsating inner tube 2 which at its upper end has a projecting ange 3 clamped in position by a cap 4 screwing upon the top of the casing. rl`ube 2 is provided upon the outside with a recessed ring 5 and longitudinal V shaped recesses 6 which are shallnwer at the top of the tube than at the bottom, and together with the recessed ring facilitate the pulsation of said tube and cause it to contract under pressure at its upper end in advance of the lower. The lower end of the tube 2 is clamped against a shoulder 7 extending around the inside of the casing, by a tubular screwed nipple 8 4which passes through a hole in the bottom of the {i'eXible ulsator tube andhas a projecting head 9. A disk nut- 10 having wings 11 by which it is turned,

screws upon the nipple 8 and eiects the clamping.

In a modification' shown in Figs. 8 and 9 the ieXible tube 2L is secured to the upper end ofthe casing by. being turned over the upper edge of the casing and secured by a suitable cap and its lower end receives a conica-l nipple 3a adapted to be forced into the tube by -a cap 4 which screws upon the casing and thereby clamps the tube in position. The cap has a connecting nippleSa.

The nipple is connected by a pipe 12 (see Fig. 1) with a cross tube 13 fixed to the milk pipe member 14: of a branch piece which alsov comprises the pulsatingpipe 15. The pipes 14 and 15 are connected by the cross tubes 13 and 18 and also by the cross tubes 16 and 17 through which pulsation of the iexible tube of the teat cups is ei'ected. One end of the tube 17 is connected to a nipple 19 pro-f jecting from the casing 1 and through which `21 having the piston heads 22 and 23, is

reciprocated by any convenient means. The end 24 of the cylinder is open-while the opposite end is closed by a screw cap 25 which bears against a brass .washer 26. A port 27 communicates with the pulsator pipe 28 which is itted with a stop cock 29 and leads to the pipe 15 of the branch piece. Port 30 .communicates with Athe pipe. 302* provided with a stop cock 31, and leading to a nipple 32 in the cover 33 of the cylindrical pail head 311. A port 51 intermediate between ports 27 and 30 communicates with a pipe leading to the vacuum pump of the milking plant. A port 35 opens communication with the atmosphere through one or other of a series of holes 36 of varying size in a split ring 37 rotatable upon the cylinder for the purpose of enabling the amount of air admitted to beadjusted, the ring being clampedin position by .a clamping screw 38.

The milk pipe 14 of the branch piece is connected by a pipe 39 to a stand pipe 40 .which is provided at the upper end with a ing into the pipe 32. The pail head lits a' hole in the lid of the vacuum milk pail, an air tightjoint being effected by a rubber ring 44 between the flange and the lid. A similar joint' is formed by a rubber ring between the lid 33 and the top of the pail head. A float valve 46 guided upon a pin projecting upwardly from the bottom of the pail head has a ring valve face 47 adapted to seat upon a ring 4S and to close ports 49 through the bottom of the pail head inside ring 48. One or more small holes perforate the bottom outside of the ring,

In operation, air is by means of the reciprocation of the piston valve of the pulsator, alternately admitted to and withdrawn from the space between the tube 2 and the casing of the teat cup whereby said tube is caused to contract upon the teat and then release it. At the same time, partial vacuum is produced inside tube 2 which holds the teat, and within the vacuum pail through the ports in the pail head. The float rises upon the milk and allows it to iow through the ports 49 into the vacuum pail. -Ateach reciprocation of the pulsator piston a small quantity of air is admitted to the pail head, and through it to inside the tube 2, thus facilitating the flow of milk and assisting the expansion of tube 2. A very small quantity oi tir also passes through the holes 50 into tht vacuum pail, thereby reducing t-he vacuum therein and facilitating the rise of the float valve from its seat vwhen the vacuum is restored in the pail head by the return of the pulsator piston. A glass tube 52 insertedi'n the stand pipe 40 and visible through apertures enables the flow of milk to be seen.

The employment of the pail head with the tloat valve makes it possible to reduce the vacuum within the tube 2 of the teat cup Copies of this patent may be obtained for Without its being necessary to reduce the vacuum in the milk pail to the same extent. i lVhat I do claim and desire to secure by Letters Patent of the United States is 1. A pulsator comprising in combination a cylinder open at one end, a piston valve reciprocable therein, two :i-piston heads upon said valve, a vacuum port "in said cylinder leading to a vacuum pump, two ports one upon each side of said vacuum port, a closure for one end of said cylinder, and means for admitting a regulatable ,quantity of air to that end, substantially as herein specilied and illustrated.

2. In a pulsator, means for admitting a. regulatable quantity of air to the interior of the cylinder comprising in combination the cylinder, a port therein, a 'split rotatable ring upon said cylinder, holes through said ringvadapted to coincide with said port, and a clamping screw for the ring, substantially as herein speciied and illustrated.

3. A pail head comprising in combination a cylindrical casing, an air tight cover therefor, a milk pipe projecting through said cover, a connection for a vacuum pipe, ports in the bottom of the casing, a guided float valve controlling said ports, and perforations through the bottom of the casing outside the seat of said 'float valve, substantially as herein specified and illustrated.

4. In milking machines, means for partially closing communication between the pail head and the vacuum pail, comprising in combination a cylindrical casing, portsY in the bottom thereof communicating with the vacuum milk pail, a floatvalve adapted to close said ports, and perforations through the bottom of said casing outside the seat of said Valve, substantially as herein speci- :tied and illustrated.

- 'In testimony whereof I have signed my name to this specification in the presence of two witnesses.

HENRY DRoU'rLnen.`

lVitnessest ARTHUR Lnwrr'r FnRNEYHoUGH, HARoLu JOHN SARSFIELD BURGOYNF..

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

